Keyhole cover



Oct. 30, 1945. T. H. JoHNsToNE KEYHOLE COVER Filed May 25, 1944`fromrtlie keyway..

Patented Oct. 3 0, 1945 f. fknmoLE cot/ER Y, Theodore H;

1J olinstone, Detroit, assigner."

tofTlfeYaieTbwne Manufazcn'ing'Cmpany, Stamford, Gbnnf.,vacorporation ofConnecticut ApplicationMay. 25, 1944;SerialiNm igzil` isrciaimsf (ci:viv-45s) Thistinvention relates ,to akeyholecoverffor a lock, andL is animprovement over-the invention disclosedI in my patent No.. 2,355,300.for a' Key holegcover andassen'ilolyiA t f t Intrrry7 patent. Idisclose; aikeys` holecover and assembly particularly. adapted,- to'prevents the.- entrance; of rainor snow, into,L ai keyWay, and-;tofacilitate, thel escape of; water ci,conclensatitm` The inventionfofthesaid patent.emhodies. ashutter that. is: mounted on` the frantoitheflocle andiisadapteditomove,into and out,oicoveringfrelationitothekeyway of the lock Amimnortant feature of the. said. invention re.-sides ,inthe ,manner which thesvv-infging` shutter cooperatesL with..the surface. outlining an openinethrongh Whichthe keyway of thelockdsaccessible.. i n l I Y An object `of the invention of the presentapplication is to` improve `the shutter; construction sof, aeto, better`seal the opening through which the. keyvvay` of. the lockisaccessible... `AniadclitionalA feature of the` inventionv resides in themounting` of,4 the shutter relatively; to the lock, andthe means wherebythe` shutter is controlled inits movementrelatively. to thelock. A

As a..feature of my inventiomlfutilizeashutter thajtiis adapted, to,move relativelyfto the key hole ofthe lock, and is equippedvvithacover/means orV seal,thatllrioves..with` the shutter; but is-.springpressed relatively7 thereto and intosealing `relation,to..the.key.holeofthe, lock. ,4 Aiurther feature of, my invention resides in the.:utilization of aL `novel,form ofispI-ing for. controllingC themovementof the shutter. and for facilitatingithe assembly of. thefshutterrelatively tothelockbody... l V

I-.havethnsoutlined myinventionfin orderfthat 'its. .relationship.ftolthe prior art; andfto .the in.-

ventioniof `my earlier" applicationmay be clearly understood. There are.ofcoursefeaturesof` my inventionthatll have notasyyetreferred to, butth'ey will be fully set forth inv the. specification thatiollowsand..will be claimedin the claims apnended. hereto., `Naturall y, thoseskilled.- in the art.' willpreaclilyA conceive various'. structuralmeans for. utilizingmy invention, sol that my invention shoill'dj. notbe limited to the. specific. structure I shall heremillustrate anddescribe.

Refrringnow to the drawing Where a. pref ferred ,formf my invention .isshown, fliig.y Lis, a perspective view. ot a typical` cylinder lockt towhich.my, invention may beV applied... Eig,4 2 i's. a frontyievvoflthelockfli'g. Lshovvingtheshutter maintained at one side. Eig...3.is, a..pa`rtial vertical.sectiomthroughmy,lock.. Eig.- Lis a sectiomtakenzalong: linesrd-Iltoflig; 3i islas View: of certaini parts: ofEiga. 4s illustra-ting; the. relationshipv of? the parts: Wheni theshutter: is movedt'oil its-position of Fig. .2.' Fig. distan-exeplodedi-:view showing theiconstructionf offtlieffronii end of mylockrandi thescalplappliedftheretn:

exploded. View.A ofiY the. parts; the shutter;

l Referring new. more particularlytoitheidrawine, azcylinderflocktowhich.fmy*inventionimaysber appliedlissdesignatedbyrreference numerallfs'andf isshown: bored: at` |42 forn the rotation"` relatively theretoof.` a, conventionali key: plug.V I ad'apted to aetuateanconnectingtbar: I2; rIfhe frontiendo theylinder IB may` he formedfasfbest shownn'.Fig; 6, withL a.. depressed" opening-f` or recess-1I 3fof ratherunusualshapm recesszis of@coursefgiri' communicationy with.n the'l boreIllJ in wh'iclr isz mountedfthelkey` plugY I=I the liead of'tlelieyiplug-lying:withinsthefrecess*orfdepaessibnfli The head #off-thecylinder` f Iii4 is slottedasatl IS-fortlie escape of? suchf moistureas' mayfcondenseoutlofl A the keyway I6 of the key plug-| It;`all'"inaccordance with theA teachings oif'my` patent suprai The head-lofi thed cylinder iIi has: extending therefromy atpost` I Il having albore-.- I8 i for a? purpose toJbehereinafter. setifortli.' spacedfi'omthe post I'If is anpartialfcylindricallHarige; I9"t'erminat ingf at20and2l. The cylinder IIPWill beeman'ufactured preferably bydielfcasting l the same; and itzis thereforerelativelyrsimpletoformLi-t-.as set' fiortl' inathedrawingandas'ijust described? lItaisapreferredI inthe arttto nisliethe'lieads offlocl cylinders:withscalps; this-` beingmore economical and `more l satisfactory than14finishingY theiheadskproper; Tlief scalprfor my lockJis designated'ibyreferencenumeral 251,- andis formedof sheet metal preferablychromiumplated; and equippedwithlugs Zai An openingiliisformed thelfscalp f25-1for alignment Witli` the# boi-'e f I 4 of the cylinder lock, and"asecondlopening 2'8-`is formed` forrthe; passage of the cylindricalflange I9. The scalp 25E`i's-'placed overtle-iheadof thecylindetilock.Ifiasibest illustrated in Siandf is: held assembled' toltheshea'd. in the usual mane ner-Well known; inf;` the art` through..the lugs;z 2li: It'is Well atthisipointto. indicatexthati While-'1Tprefer to utilize the scalp 25, andshall .illustrate mynovel` key holevcover cooperatingi withi the scalp, those skilledv in:` the art' williappreciate.I that invention, may he utilized inl` a: lock;i ot theclass.descrbednotrhaving ascelp-.i` l 1 The key. hole shutter and; thekey holea` seal of; my invention arebestz.shovvrn-inilligs@4 1 and??h LIn:

litigi 7. the ..shutter is; designated.n by reference nu.:-

meral 30 and is formed with a partial ange 3| lterminating at 32 and32a. The shutter 30 is V ed'to be held in a partially Wound or tensionedposition with one leg 34 against surface 20 of away from the shutter andout of the depression 4I thereof because of the pressure of the theflange I9 and with its other leg 35 against the surface 2I of the flangeI9.

When the shutter 30 is assembled relatively to the lock by insertionover the post' I1, surface 32a of its flange 3l will lie against the leg34 oi' the spring 33 while its surface 32 will lie against the leg 35 ofthe spring 33. It is obvious that with this relation of the parts, theshutter 30 will be held yieldingly in its central position of Fig. 1 andagainst pivotal'movement about the post I1. For preventing endwisemovement of the shutter 30 off the post I1, a headed pin 4I! is'utilizedas best-shown in Fig. 3. This headed pin 4I] is forced into the bore I8of the post I1 and holds the parts assembled as illustrated in Fig. 3.

, The inner face ofthe shutter 30 is formed with a depression 4I Withinwhich is mounted a seal 42 in the form of a disk. A spring 43 liesbetween'the seal 42 and the inner surface of the depression 4I and tendsto press the seal 42 relatively to the shutter 30 and against ra. flange44 outlining the opening 21 of the scalp 25. In Fig. 3, the seal 42 isshown against the flange 44 and inr sealing relation to the opening 21.The direct application of the pressure of spring 43 against the seal 42urging it towards the flange 44, is extremely effective in sealing theopening 21. As a matter of fact, the seal is considerably better thanthat of my patent supra, although the results obtained from my earlierinvention are very superior toV those obtained from the earlier sealsemployed in the art.

When it is desired to obtain access to the keyway I6, the shutter 30 ismovedfrom its position of Fig. 1 to its position of Fig. 2. As theshutter moves to the position of Fig. 2, the surface 32a of the flange3| will press against -the leg 34 of the spring 33 and will move thatspring leg to the position of Fig. 5. Fig. shows the position of thespring 33 and cooperating parts when the shutter is in its position ofFig. 2. In Fig. 5 the leg 34 of the spring 33 is shown against the limitsurface 2I of the flange I9. 'In order to further rotate the shutter inthe direction in Which it is movedV to its position of Figs. 2 and 5, itwould be necessary to shear the leg 34 of the spring 33. Therefore, itmay be said that spring 33. yieldingly limits the throw of the shutter30. This is a very important feature of the invention asV those skilledin the art will fully appreciate.

spring 43.

I believe that the operation and construction of my invention will nowbe apparent to those skilled in the art.

I now claim:

1. In a lock of the class described, a key hole shutter, means mountingsaid key hole shutter on said lock for movement relatively to the keyhole of said lock, and cover means movable with said' key hole shutterand relatively to said key hole shutter for covering the said key hole.

It is important at this point to note also the e a se of assembly oftheshutter 30 relatively to the head of the cylinder Ill. Thus, becauseof the type of spring utilized, the mere placing ofthe ange 3I of theshutter 30 over the post I1, eifectively assembles the shutterrelatively lto the spring 33.

As the shutter moves from its position ofr Fig; 1-

to its position of Fig. 2, the flange 44 Will act to cam the seal 42toward the shutter and out of sealing position, Vso that the sealmay'move with the shutter to the position of Fig. 2. In vthe position ofthe parts in'Fig. 2, the seal 42 is held byV the-front end of the'scalp25 against movement 2.v In a lock of the class described, a key holeshutter mounted on said lock for movement relatively to the key hole ofsaid lock, and cover means movably mounted on said key hole shutter formovement relatively thereto into covering relation to said key hole,While moving bodily with said key hole shutter relatively to the keyhole.

3. In a lock of the class-described, a key hole shutter, means mountingsaid key hole shutter on said lock for movement relatively to the keyhole of said lock, cover means movable with said key hole shutter andrelatively to said key hole shutter for covering the said key hole, anda spring for-pressing said cover means relatively to said key holeshutter and againstV said key hole.

4. In alock of the class described, a key holel shutter, means mountingsaid key hole shutter on said lock for movement relatively to an openingof the lock through which a key is inserted into the key hole ofthelock, .cover means movable with said key hole shutter and relatively tosaid key hole shutter for covering the said opening, and the saidopening having a sealing outlining surface for sealing cooperation withsaid cover means.4

5. In a lock of the class described, a key hole shutter, means mountingsaid key hole shutter on said lock for movement relatively to the keyholeNof said lock, a spring between said key hole shutter and lock forurging said key hole shutter into a predetermined position relatively tosaid lock, cover means movable with said key hole shutter and relativelyto said key hole shutter for covering the said key hole, and a springfor pressing said cover means relatively to said l key holeshutter andtoward coveringrelation to said key hole. l y

, 6. In a lock of the'class described, having a key hole, a key holeshutter, means mounting said key hole shutter on a portion of said lockfor movement relatively to said key hole, a key hole seal mounted onsaid key hole shutter and movable relatively thereto, a spring `pressingsaid key hole seal-relatively to said key hole shutter and towardsealing relation to said key hole, and a surface formed on said key holeseal for camming it against the pressure of saidspring out of saidsealing relation as said seal moves with said key holeshutter. Y y

7. InV a .lock of the class described, having a key hole, a key holeshutter, means mounting said key hole shutter on a portion of said lockformovement relatively to said key hole,'a key hole seal mounted on saidkey hole shutter and movable relatively thereto, a spring pressing saidkey` hole seal relatively to said key hole shutter and toward a cavityformed about the front end of said key hole, and a sealing surfaceformed on said key .hole seal for 'sealing contact with the periphery ofsaid cavity whereby effectively to seal said key hole. e

8. In a lock of the'class described, having a key hole, a key holeshutter, means mounting said key hole shutter on a portion of said lockfor movement relatively to said key hole, a key hole seal mounted onsaid key hole shutter and movable relatively thereto, a spring pressingsaid key hole seal relatively to said key hole shutter and toward acavity formed about the front end of said key hole, a sealingsurfaceformed on said key hole seal for sealing contact with theperiphery of said cavity whereby effectively to seal said key-hole whensaid key hole seal is moved with said key hole shutter into positionopposite said cavity, and a spring for yieldingly positioning said keyhole shutter with said key hole seal opposite said cavity.

9. In a lock of the class described having a front head portion, atorsion spring mounted on said lock and having opposed ends, means onsaid head portion limiting the throw of each of said ends whereby tohold said spring in an initial position, a key hole shutter havingopposed parts cooperable with said opposed spring ends, means mountingsaid key hole shutter for rotation substantially about the axis of `saidspring and relatively to the said lock, the rotation of said key holeshutter in one direction being opposed by one of said spring ends whileits rotation in a reverse direction is opposed by the other of saidspring ends.

10. In a lock of the class described having a front head portion, atorsion spring mounted on said front head portion and having opposedends, means on said head portion limiting the throw of each of said endswhereby to hold said spring in an initial position, a key hole shutter`having opposed parts cooperable with said opposed spring ends, meansmounting said key hole shutter for rotation substantially about the axisof said spring and relatively to the face of said front' head portion,the rotation of said key hole shutter in one direction being opposed byone of said spring ends while its rotation in a reverse direction isopposed by the other of said spring ends, the rotation `of said key holeshutter moving one of said spring ends until it contacts the limit meansof the other of said spring ends to limit the rotation of said key holecover.

11. In a lock of the class described having a key opening for the'insertion of a key, a pin extending from said lock body, a shutterpivotally mounted on said pin for pivotal movement relatively to saidlock body, a spring placed about said pin and having opposed legs, aportion of said shutter cooperating with one of said legs to move saidleg as said shutter is pivoted in one direction, a second portion ofsaid shutter similarly cooperable with the other of said legs when saidshutter is pivoted in a reverse direction, and means whereby themovement of said legs is limited to limit the throw of said shutter.

ins.

12. In a lock of the class described having a front head portion, a keyplug rotatable in a bore formed in said lock body, a scalp assembled onsaid head portion and having an opening in alignment with the key plug,a shutter mounted on said lock body for movement relatively to saidscalp into and out of covering relation to said opening, a seal for saidopening movably mounted on said shutter and movable therewith, and aspring for pressing said seal relatively to said shutter and towardsealing relation to said open- 13. In a lock of the class describedhaving a front head portion, a key plug rotatable in a bore formed insaid lock body, a scalp assembled on said head portion and having anopening in alignment with the key plug, a shutter mounted on said lockbody for movement relatively to said scalp into and out of coveringrelation to said opening, a seal for said opening movably mounted onsaid shutter and movable therewith, and a spring for pressing said sealrelatively to said shutter and toward sealing relation to said opening,said seal being formed so as to be cammed by the surface defining saidopening towardlsaid shutter and out of sealing relation to said openingwhen said shutter is moved away from covering relation to said opening.

k14. In a lock of the class described, a lock body, a key plug rotatable,in said lock body, a scalp, means securing said scalp on said lock bodyto form an integral part thereof, said scalp having a depressed openingin alignment with said key plug, the periphery of said opening beingdefined by an inwardly flanged surface, a. shutter mounted on said lockbody for movement relatively to said scalp into and out of coveringrelation to said opening, a seal for said opening movably mounted onsaid shutter and having a flanged portion corresponding to the peripheryof said opening for sealing said opening, and a spring for pressing saidseal relatively to said shutter and toward sealing relation to saidopening.

15. In a lock of the class described having a front head portion, aspring mounted on said front head portion and having opposed ends, a keyhole shutter having opposed parts cooperable with said opposed springends, means mounting said key hole shutter for rotation relatively `tothe face of said front head portion, the rotation of said key holeshutter in one direction being opposed by one of its opposed partscooperable with one of said spring ends while its rotation in a reversedirection is opposed by the other of its opposed parts cooperable withthe other of said spring ends.

THEODORE H. JOHNSTONE.

